Investors and security holders will be able to obtain free copies of the proxy statement/prospectus and all other relevant documents filed or that will be filed with the SEC by Atlantic Coastal through the website maintained by the SEC at www.sec.gov. In addition, the documents filed by Atlantic Coastal may be obtained free of charge from Atlantic Coastal’s website at www.Atlantic Coastalv.io or by written request to Atlantic Coastal at Atlantic Coastal Acquisition Corp., 6 St Johns Lane, Floor 5, New York, NY 10013.

Participants in the Solicitation

Atlantic Coastal and Essentium and their respective directors and officers may be deemed to be participants in the solicitation of proxies from Atlantic Coastal’s shareholders in connection with the Proposed Business Combination. Information about Atlantic Coastal’s directors and executive officers and their ownership of Atlantic Coastal’s securities is set forth in Atlantic Coastal’s filings with the SEC. To the extent that holdings of Atlantic Coastal’s securities have changed since the amounts printed in the Form S-1, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC. Additional information regarding the interests of those persons and other persons who may be deemed participants in the Proposed Business Combination may be obtained by reading the proxy statement/prospectus regarding the Proposed Business Combination when it becomes available. You may obtain free copies of these documents as described in the preceding paragraph.

Non-Solicitation

This press release shall not constitute a proxy statement or solicitation of a proxy, consent or authorization with respect to any securities or in respect of the Proposed Business Combination. This press release shall also not constitute an offer to sell or a solicitation of an offer to buy any securities of Atlantic Coastal, Essentium or the combined company, nor shall there be any sale of securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

¹ United States Department of Defense FY 2022 Budget Request and management estimates; Military Strategic Readiness budget defined as the portion of the overall DoD budget allocated to fund Joint Force strategic military readiness and preparedness through investments in modernizing capabilities across all branches of the Armed Forces.

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Essentium Investor Relations
IR@Essentium.com

Essentium Media Relations
PR@Essentium.com

Atlantic Coastal Acquisition Corp.
Tony Eisenberg
Tony@atlanticcoastalacquisition.com